11.   The discovery means that three of those five are now accounted for, Civil War historians said.

12.   The early discovery meant that, although Stone would lose the kidney, he would not have to undergo radiation or chemotherapy.

13.   What those discoveries really mean, however, will be the subject of the next round of study.

14.   The discovery means that one day cells could be taken from a person, rejuvenated and returned to them.

15.   The discovery means that potential parents will be able to find out whether they carry the recessive trait that causes the rare inherited disorder, called rod monochromacy.

16.   What does the discovery mean to the average person?

17.   But for Salk, the discovery meant more than a victory over a single disease.